TBH I have yet to understand pricing on ultra-high-end notebooks that can come out to $15k (like Precision 7000 series) but the specs on paper can end up slower than a fast gaming laptop. Is it something about build quality, cooling, durability, harsh environments? Or maybe they send 5 engineers onsite by helicopter when it needs service? (kidding about the last one). Maybe a buyer of those could explain the difference in value.
I agree. There is a price disadvantage for buying RAM, SSD, etc. pre-installed from the Mfr and the difference vs installing aftermarket can get pretty big. I don't mind adding drives or RAM at all. Do you find CPU thermal paste a little fiddly to work with?